Pommy
noun
Pom·my ˈpä-mē 
variants or Pommie
plural Pommies
Australia and New Zealand, slang, usually disparaging
: briton
especially : an English immigrant
Word History
Etymology
by shortening & alteration from pomegranate, alteration of Jimmy Grant, rhyming slang for immigrant
First Known Use
1912, in the meaning defined above